Council Directive 2013/51/EuratomShow full title

6. Minimum sampling and analysis frequencies

The minimum sampling and analysis frequency for the monitoring of water intended for human consumption supplied from a distribution network or from a tanker or used in a food production undertaking shall be as set out in the following table:

Table

Minimum sampling and analysis frequencies for monitoring of water intended for human consumption supplied from a distribution network or from a tanker or used in a food production undertaking

Note 1: A supply zone is a geographically defined area within which water intended for human consumption comes from one or more sources and within which water quality may be considered as being approximately uniform.
Note 2: The volumes are calculated as averages taken over a calendar year. A Member State may use the number of inhabitants in a supply zone instead of the volume of water to determine the minimum frequency, assuming a water consumption of 200 l/day/capita.
Note 3: As far as possible, the number of samples should be distributed equally in time and location.
Note 4: In the event of intermittent short-term supply the monitoring frequency of water distributed by tankers is to be decided by the Member State concerned.
Note 5: The frequency is to be decided by the Member State concerned.
Member States shall define sampling frequencies for water intended for human consumption put into bottles or containers intended for sale. In so doing Member States may take into consideration the volume of water produced.
Volume of water distributed or produced each day within a supply zone(Notes 1 and 2)m3	Number of samples per year(Notes 3 and 4)
volume ≤ 100	(Note 5)
100 < volume ≤ 1 000	1
1 000 < volume ≤ 10 000	1 + 1 for each 3 300 m3/d and part thereof of the total volume
10 000 < volume ≤ 100 000	3 + 1 for each 10 000 m3/d and part thereof of the total volume
volume > 100 000	10 + 1 for each 25 000 m3/d and part thereof of the total volume